Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation Plans [Abstract]

Assumptions to estimate fair value of stock options and SAR's

	Date of Grant									As of December 31, 2011
	Stock Options 2011			Stock Options 2010			SARs 2010			SARs 2010			SARs 2009
Weighted average fair value of stock options granted and SARs outstanding	$	17.85		$	9.96		$	10.19		$	16.63		$	16.67
Expected volatility		72.56	%		73	%		73.7	%		82.0	%		71.1	%
Expected life		6.0 years			6.0 years			6.0 years			4.2 years			3.1 years
Risk-free interest rate		2.3	%		2.0	%		2.7	%		0.64	%		0.38	%
Expected dividend yield		—			—			—			—			—

Summary of stock option and SAR's activity

	Stock Options					SARs
	Shares			Weighted Average Exercise		Shares			Weighted Average Exercise
Stock options outstanding at December 31, 2008		243,370		$	33.80		—		$	—
Granted		163,720			10.00		112,471			10.00
Exercised		—			—		—			—
Cancelled/Forfeited		(14,412	)		44.36		—			—
Stock options outstanding at December 31, 2009		392,678			23.48		112,471			10.00
Granted		4,089			15.30		151,287			15.40
Exercised		(29,104	)		9.81		(16,639	)		10.00
Canceled/forfeited		(36,823	)		23.31		(16,556	)		11.17
Outstanding at December 31, 2010		330,840			24.60		230,563			13.46
Granted		139,916			27.39		—			—
Exercised		(129,785	)		11.41		(119,801	)		13.10
Canceled/forfeited		(19,364	)		40.16		(3,123	)		14.46
Outstanding at December 31, 2011		321,607		$	30.20		107,639		$	13.83

Exercise Price Range

	Options Outstanding						Options Exercisable
Range of Exercise Price	Number Outstanding		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)		Number Exercisable		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)
$ 0.00-$10.00		61,116	$	9.77		6.29		34,844	$	9.60		5.68
$10.00-$20.00		4,754	$	15.75		7.49		2,028	$	16.35		6.01
$20.00-$30.00		149,360	$	26.66		6.74		55,500	$	25.82		2.76
$30.00-$40.00		52,305	$	39.16		3.55		49,743	$	39.39		3.26
$40.00-$50.00		23,264	$	48.50		4.37		23,264	$	48.50		4.37
$50.00-$60.00		14,781	$	51.40		3.35		14,781	$	51.40		3.35
$60.00-$70.00		3,219	$	66.60		2.02		3,219	$	66.60		2.02
$70.00-$80.00		12,808	$	70.90		2.14		12,808	$	70.90		2.14

Summary of restricted stock and restricted stock units activity

	Restricted Stock					Restricted Stock Units
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Units			Weighted Average Fair Value
Outstanding at December 31, 2008		73,087		$	41.50		—		$	—
Granted		98,983			6.90		67,485			6.90
Vested		(32,084	)		41.65		—			—
Cancelled/Forfeited		(5,597	)		42.32		—			—
Outstanding at December 31, 2009		134,389			15.95		67,485			18.06
Granted		2,363			15.30		91,378			15.40
Vested		(57,926	)		21.90		(22,500	)		15.24
Cancelled/Forfeited		(14,203	)		12.43		(9,947	)		15.76
Outstanding at December 31, 2010		64,623			11.37		126,416			27.32
Granted		205,463			27.37		—			—
Vested		(85,323	)		19.36		(79,014	)		27.87
Cancelled/Forfeited		(11,254	)		26.89		(1,884	)		25.03
Outstanding at December 31, 2011		173,509		$	25.38		45,518		$	24.14

Summary of performance shares and performance unit activity

	Performance Shares					Performance Units
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Units			Weighted Average Fair Value
Outstanding at December 31, 2008		54,767		$	47.40		—		$	—
Granted		98,233			8.60		67,485			8.60
Vested		—			—		—			—
Cancelled/Forfeited		(16,702	)		46.70		—			—
Outstanding at December 31, 2009		136,298			16.59		67,485			27.53
Granted		2,363			18.65		91,378			19.94
Vested		—			—		—			—
Cancelled/Forfeited		(37,833	)		17.53		(13,840	)		20.12
Outstanding at December 31, 2010		100,828			16.29		145,023			35.41
Granted		81,489			42.72		—			—
Vested		(56,830	)		23.24		(57,948	)		24.68
Cancelled/Forfeited		(19,558	)		48.62		(2,536	)		25.03
Outstanding at December 31, 2011		105,929		$	26.92		84,539		$	39.78